Rods and cone cells Flashcards
1
Q
where in the eye is the highest density of cone cells found in ?
A
- in the fovea
2
Q
how many rod cells are there per eye ?
A
- 10^9 cells per eye
3
Q
how many cone cells are there per eye in the fovea ?
A
- 10^6 cells per eye
4
Q
what are rods used for ?
A
- used for peripheral vision
5
Q
what are cones used for ?
A
- detect images in the centre of the retina
6
Q
what kind of sensitivity do rod cells have ?
and what does this allow for ?
A
- good sensitivity
- used for night vision as they can detect a single proton of light
7
Q
what kind of sensitivity do cone cells have ?
what does that mean that they need ?
A
- poor sensitivity
- need bright light
8
Q
how many types of rod cells are there ?
what kind of vision is this ?
A
- only 1 type
- monochromatic vision
9
Q
how many types of cone cells are there ?
what kind of vision is this ?
A
- 3 types
- red, green, blue
- responsible for colour vision
10
Q
what is meant by accuity ?
A
- resolution power
11
Q
what kind of accuity do rod cells have
A
- poor accuity
12
Q
what kind of accuity do cone cells have ?
A
- good accuity
13
Q
A
